Mask of the Phantasm pwns ALL!!!!!!!!!!!
I loved that movie. In my opinion, it is tied with The Dark Knight and I consider TDK to be the best superhero movie ever. I know a lot of people will disagree with me but it's my opinion. So...yeah, TDK and Mask of the Phantasm are my top 2 comic book movies ever!

I've honestly never seen Subzero. I've heard by many fans that it's really good, but I still just never got around to actually watching it. I do need to give MOTP another viewing sometime soon. Feels like forever since I've watched it.

Honestly, I've seen Batman: Mask of the Phantasm, Batman Sub-Zero, Batman Beyond: Return of the Joker, Batman: Mystery of the Batwoman, and Batman: Under the Red Hood. I'd say Phantasm was probably the best. Red Hood would go second, Sub-Zero would tie with Batman Beyond, and Batwoman would go last.